-24057

Appears in sequences

• A Chebyshev polynomial triangle of the first kind defined by T(n+1,x) = 3x*T(n,x) - T(n-1,x).at n=31A136159
• Fibonacci matrix read by antidiagonals. (Inverse of A136158.)at n=46A164948
• Expansion of (1-27x^2-108x^3)/((1-3x)^2*(1+3x+9x^2)).at n=7A168072
• a(n) = 3*a(n-1) - 6*a(n-2), with a(0)=0, a(1)=1.at n=12A190960